code: def test_tg_init_plain(self):
      tg = graphistry.tigergraph()
      self.assertTrue(isinstance(tg, graphistry.plotter.Plotter))
  
file_path: pygraphistry/graphistry/tests/test_tigergraph.py
imports: import graphistry
  from common import NoAuthTestCase
label_desc: Use image node_id 1 for calling the TestTiger obj's underlying member method code with example usage: obj.test_tg_init_plain() without return types